service generator blueprint is not overriding the default ember-cli in ember 3.2.0

In `ember-cli 3.1.4` `ember g service test` creates a `.ts` file with all the lovely shiny stuff in it.

In `ember-cli 3.2.0` I generated a new one with `ember g service test` and got:


```
// addon/test/service.js
import Service from '@ember/service';

export default class Test1Service extends Service {
}
```